Bob-sleigh



(No Model.)

. D. W. SOOBIE.

BOB SLEIGH.

Patented May 7, 1889.

UNITED STATES PATENT OFFICE DAVID W. SOOBIE, OF CAMBRIDGE, \VISCONSIN.

BOB-SLEIGH.

SPECIFICATION forming part of Letters Patent No. 402,983, dated May '7,1889. Application filed February 26, 1889. Serial No. 301,221.. (Nomodel.)

To all whom it 11mg concern.-

Be it known that I, DAVID W. SOOBIE, of Cambridge, in the county of Daneand State of WVisconsin, have invented new and useful Improvements inBob-Sleighs; and I do hereby declare the following to be a full, clear,and exact description of said invention, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

My invention relates to improvements in bob-sleighs; and it pertains tothe peculiar construction and arrangement of the knees and cross-beamswhich communicate between the runners of the respective bobs, wherebyeither one or both of the runners of the respective bobs are free tooscillate upward and downward, either together or separately, beneaththe cross-beams withoutturning or twisting said cross-beams.

The construction of my improvements is explained by reference tothe'accompanying drawings, in which" Figure 1 represents a perspectiveView of a bob-sleigh in which such improvements are embodied. Fig. 2represents a side view provided with my improved knee and cross-beam,shown part in section. Fig. 3 represents a vertical section through theknee and crossbeam, drawn on line X X of Fig. 2. Fig. 4 represents abottom view of my improvement, part in section, drawn on line Y Y ofFig. 2.

Like parts are represented by the same reference-letters throughout theseveral views.

The runners A, bolsters B, and reach 0 are all constructed in theordinary manner.

The improvements to which my invention relates pertain to the peculiarconstruction and arrangement of the cross-beams D D and the knees E. Theknees E are preferably formed of metal, the lower ends of which areformed in two parts or arms, (t a, which diverge from each other towardthe right and left beneath the beams, and are secured at their lowerends to the runners F by retainin g bolts or rivets Z) Z) and c c. Theupper ends of the knees are made concave, forming a semicircular seat,G, for the reception of therounded or cylindrical-shaped ends H of thecross-beams D, which nicely fit in said seats G and permit of theturning movement of the knees E beneath them as the runners oscillateupward and downward in conformity to the surface over which they arebeing drawn. The central portions of the seats G are provided withelongated slots I I for the reception of the lower end of the beam-retaining bolts J J. The bolts J J are rigidly secured within aperturesprovided therefor in the ends of the cross-beams D, while the lower endsextend down throughthe seat G and are provided with retaining-nuts K.

L is a bearing-plate interposed between the convex surface of thecross-beam D and the heads of the beam-retaining bolts J. Theretaining-nuts K are left sufficiently loose to permit of the freeoscillating movement of the runners and knees beneath the crossbeams.Thus it is obvious that when one of the runners is thrown upward inpassing over an obstruct-ion, as shown in Fig. 1, said runner ispermitted to turn freely beneath the load without twisting or strainingthe beam connected therewith. It is also obvious that both of therunners in either bob are permitted to turn in passing over an unevensurface beneath the load without twisting the beams or straining theother parts of the sleigh connected therewith.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is-

1. In a bob-sleigh, the combination, with the runners of the respectivebobs, of the knees E E, provided with concave bearings or seats G, forthe reception of the ends of the crossbeams, and bolt-retaining slots I,for the reception of the beam-retaining bolts J, crossbeams D D, havingrounded or cylindrical bearing-surfaces H at their respective endsconforming in shape to the concave surface of said knees, andbeamretaining bolts J J, rigidly affixed at their upper ends to the endsof said cross-beams and at their lower ends within the retaining-slots Iof said knees, substantially as and for the purpose specified.

2. In a bob-sleigh, the combination of the knees E E, provided at theirupper ends with concave bearingsurfaces for the reception of the ends ofthe cross-beams and attheir lower ends with diverging arms a a, securedto the runners by retaining bolts or rivets, cross- In testimony whereofI affix my signature in I0 beams D D, having cylindricalbearing-surpresence of two Witnesses.

faces conforming in shape to the bearing-surfaces of said knees, andbeanvretaining bolts DAVID V. SCOBIE.

J rigidly secured at their upper ends in the ends of said cross-beamsand operating at \Vitnesses:

their lower ends within the slots I of the beam- J AS. 1- ERWIN,

supporting knees, all substantially as and for ANNA, FAUST.

the purpose specified,

